Injecting services into the books service

BooksService.cs

public class BooksService : ItemsService<Book>
{
    private readonly IRepository<Book, int> _booksRepository;

    public BooksService(
        IRepository<Book, int> booksRepository,
        ISharedItems<Book> booksItems, 
        ILoggerFactory loggerFactory)
        : base(booksItems, loggerFactory)
    {
        _booksRepository = booksRepository ?? throw new ArgumentNullException(nameof(booksRepository));
    }
    //...
}